Jolt ramming-machine.



EDGAR H. IVIUMFGRD ANI) -EDJV 5R11 lJlEL'i/ILLE HUGGINS, 0F PLAINFIELI), .NIE-W' JERSEY; SAID HUGGINS ASSIGNOR 'I MUMFOBID MLDING MACHINE COMPANY,

OF'CHICAG', ILLINOIS, A CORPORATION @E NEW JERSEY; ROSE SKEEL MUM- FORD EXECU'TRIX OF SAID EDGAR EL MUMFORD. BECEASED.

isernia.,

To all whom t may concern Y Be it'lmoWn that We, EDGAR ll. MUMFoun and EDWARD lvlnLvILLn HUGG'INS, both citizens of the United States, residing at Plainiicld, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Jolt Rammingltachines, of which the following 1s a specification.

rThe invention relates to What are known as jolt ramming machines, and particularly to the valve mechanism for controlling the reciprocating member Whether it be a cylinder or a piston. rll`he invention has ior its primary objects the provision of a -valve mechanism which shall operate With` precision and positiveness; the provision of a valve of a very simple and cheap construction, and one by the use of which the amount of air Wasted is reduced to a minimum, and the provision of a valve which will be moved Works, such cylinder having atits lower end the base portion al, and at its upper end the anvil portion 5 for receiving the impact of the table; G is a block ttingin the recess in the base et and carrying the valve mechanism, such block being removably secured in position by means ot' a series oi' studs 7, one only of which is shown; 8 is an oil lcup connected 'to the cylinder in the'manner shown, and 9 is a drip cock mounted in the block 6 and adapted to drain the cylinder and the chamber carrying the valve parts.

Air is admitted to the cylinder 3 beneath the piston 2 via the admission passage 10 in the plug 11, the passage 12, the valve chamber 13, the passage 14, the pipe 15, the passage 16 through the Wall of the cylinder, the annular passage 17 around the periphery of the piston, `and the passages Specification of Letters Patent.

1S and 19 leading from the leads from the left hand end of 'the upper end of the valv its upper position Patented rait ii., isis,

Application led July 3, 1912. Serial No. "(67,618.

annular passage 1T to the lower end of the piston. piston is packed by means of the usual ring 20, and exhaust begins when the lower edge of such ring passes the exhaust port 21 on the upward movement of the piston, the air thus exhausted iii-st passing into the chainber and then through the exhaust outlet llorling in the valve chamber 13 is thepistcn valve 2i, which in the position shown permits a free passage of air from the passage 12 to the passage 13, but which vupon an upward movement seats and prevents any further passage oi' air to the pipe l5 and cylinder. A small passage 25 the passage 12 to the valve chamber 13 beneath the head of the valve. 1

Starting With the parts in the position. shoivn, the operation is as follows-assuming that the plug 11 is coupled to an air supply pipe. Air passes through the passages 10 and 12 to the valve chamber 13 and thence through the passages lil, 15, 1G, 1'?, ldand 19 tothe lower end of the piston, thus causing such piston to rise. This action continues until the packing ,ring passes the exhaust port 21 and brings the annular passage 1'? into communication with Vsuch exhaust port 21. The opening ci this exhaust port 21 permits a. sudden rush of air from the cylinder beneath the piston and from the passages leading to the valve chamber 13, and as result the pressure upon e stem and the upper sides or the valve head is so reduced that valve 2l moves upwardly and cuts off communication between the valveV chamber 13 and the passage la, being held securely in at4 this time by reason et the air pressure applied to the lower side oi.E the head. The supply oi air to the cylinder nou' being cut olf, and the exhaust chamber being open, the Weight of the piston 2 and, the parts carried thereby causes the return ot the parts to the position shown, the lower end of the piston ment striking the upper end of the valve 2l and returning it to the position shown, thus bringing the parts to their original position, the operation being repeated indefinitely as long as air is supplied through the plug 11. It will be noted that the salient features of at the end of such movej .lil

:SIG

Civ

`nitely and is not the operation are the actuation ofthe valve 2l by the rush of an' or change 1n pressure inducedvvhen the exhaust is opened, the

return of such, valve to its original position. by reason ot the positive engagement between thevalve and the piston or some member actuatedl by the piston. llt Will also be noted that the size of the passage is slight, and also that the size or' the passage 10 is less than the passage l2. .This ar rangement tends to reduce the pressure beheath the valve head, and as a result the valve remains in thi; position. shown until the exhaust port 2l, is uncovered and the lower edge or' passage 17 has obstructed passage i6, at which time the dili'erence in pressure due to the decrease in pressure in the cylinder above the end of the valve stem, and the .increase oill pressure beneath the head- Za', causes sharp upward movement of Itl'ie .valve to closed position. lVith air supplied at full pressure directly from. the passage l2 to the lower end of the valve, the tendency of the valve is to follow the movement of the piston up, that is to rise too soon and throttle the supply of air bevtore the' exhaust' is opened. l/Vith the arrangement as illustrated and described the valve remains in 'its lowest position until the exhaust is opened, thus giving a full supply of air to the cylinder until such time, and at such time the valve closes with great rapidity, entirely shutting oil' the supply ol air andeliminating any Was'e which Would occur if the valve were not fully closed. l

The arrangement thus provides for a quick positive closure of the valve and an equally quick positive opening of the 'valve incident tc the engagement between the end of the piston and the end olf the valve.

lt will be apparent that the construction as described and illustrated is simple and positive in operation, and that a valve meclr anism or this character 'will Wear indeli liable to get out of order. lt will also, be apparent that the funda mental idea involved in the operation of the valve is oagviableo'f Wide 'iation ol' embodiment, the scope of the invention being limited only by the claims', und the purpose being to comprehend any and all valve constructions-` 'n which the valve is operated in one direction-by the sudden rush of air or changeoiz pressure incident to the opening of the exhaust port, and in which the valve is positivelyjaetuated in the other direction 1from the reciprocatory member upon its re turn movemen rlhe valve may be placed in chambers located differently than.v that illustrated, and it ,iSol course not necessary that the pl'ungerjor movable member contact directlyt exil' le' valve to move it reversely, at eilte ou J .filent means might be substituted for actuating the valve positively Without direct Contact with the plunger.

inet/,air

Having; thus described our invention and illustrated its use, what we claim as new and desire to secure by Letters Patent, is the iol-` lowing:

l. A jolt ramining molding machine comprising in combination a cylinder having a. port and an opening` in its vvall above the said port, a vertically movable plunger in said cylinder adapted to uncover said opening, and a valve for controlling; the supply of fluid pressure and allowing its admission into said cylinder to raise the plunger, said valve being held in open position. by the fluid pressure Flowing to the machine and governed as to its closing movement by the uncovering of said opening by the plunger as it moves upwardly.

ln a jolt ramming mechanism, in cornbination with a vertically movable plunger arranged 'to move dovfn by the action of gravity alone and to be moi/ed upward by air pressure, of a cylinder i'or the plunger provided in its Wall with an exhaust port uncovered by the plimger as it moves upward and approaches its upward extreme of movement, and a valve for controlling the admission of air to the cylinder, held open by air pressure during),` the upward movement of the plunger and governed as its closing` movement by the uncovering' by the plunger of the said exhaust port, the said exhaust port constituting` the only means ol escape of the air from beneath the plun- 3. ln a. joltramming mechanism, in combination with a vertically movable plunger arranged to move dovvn by the action ol. gravity alone and to be moved upward by air pressure, of a cylinder for the plunger provided in its Wall with an exhaust .port uncovered by the plunger as it moves upward and vapproaches its upward eXtreme of movement, and an admission valve positively opened by the plunger as it descends, 'the-said valve being held open by air pressure during the upward movement of the plunger and governed as to its closing?,l movement by the unbalanced pressure induced by the uncovering; of the exhaust port.

Ll. ln combination in a jolt rammingg machine, a cylinder, a piston provided with a passage leadingr from' the side to the lower end thereof, an inlet passage through the side .of the cylinder adapted to register with the passage in the piston when the latter is in lower position, an exhaust port through the side or' the'oylinder adapted to register with a portion olf the passage in the piston when the latter approaches upper position, and a valve in one of the passages normally held in open position and adapted to be closed by the unbalanced air pressure induced when the exhaust port 4is brought into piston.

ria

' Copies o'this patent may liel obtained for fiveV vcents each, by Washington, ILC.

side of the cyllnder adapted the piston andv adapted to be closed by the unbalanced air pressure induced when the eX- aust port is brought into communication with the said passage in the piston.

6. A jolt ramming molding machine comprising in combination acylinder having a Wall above the vertically movable plunger 4in said port, a

` adapted to uncover said opensaid cylinder `andb signed a valve casing in communication with port, anda vertically movable valve 1u ger,said valve being normally held in open position admitting uid pressure to the port and cylinder by the incoming fluid pressure its closing' movement by the uncovering of said opening by the plungeras it moves upwardly. In testimony whereof We have hereunto our names in the presence of the two subscribed Witnesses.

EDGAR H. MUMFQRD. E. MELVILLE-HUGGINS. Witnesses as to E. H. M.:

LovnRING,

LAURA E. SMITH. WitnessesI as to E. M. H.:

E GINALD P. KNIGHTs,

EGINA BRADY.

addressing,F the Commissioner of Patents, 

